228520379 has 4 divisors (see below), whose sum is σ = 229010184. Its totient is φ = 228030576.

The previous prime is 228520363. The next prime is 228520381. The reversal of 228520379 is 973025822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228520379 - 2⁴ = 228520363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228520339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244202 + ... + 245135.

It is an arithmetic number, because the mean of its divisors is an integer number (57252546).

Almost surely, 2^228520379 is an apocalyptic number.

228520379 is a deficient number, since it is larger than the sum of its proper divisors (489805).

228520379 is an equidigital number, since it uses as much as digits as its factorization.

228520379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489804.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 228520379 is about 15116.8905202095. The cubic root of 228520379 is about 611.3758954080.

The spelling of 228520379 in words is "two hundred twenty-eight million, five hundred twenty thousand, three hundred seventy-nine".